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Lazy-ish enquiry: distribution maps
Fed up with Googling, so perhaps somebody here knows the answer: I'd
be most grateful for any help. I'm looking for online world plant distribution maps, in particular at present for stinging nettle species. I've found plenty for particular countries, but not one for the world. My curiosity is because a R4 programme about British exports of stinging-nettle tea to China (they're welcome to it) mentioned that our nettle was unknown in that country. I assume they meant either or both of _Urtica dioecia_ and _U. urens_. Either way, I was a bit surprised -- I gather the things are found at least as far east as India, and they are introductions in N. America and Australia. I never cease to be surprised at how slow plants seem to be to spread across land-masses, even allowing for deserts and mountain ranges. -- Mike. |
#2
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Lazy-ish enquiry: distribution maps
"Mike Lyle" wrote in message ... Fed up with Googling, so perhaps somebody here knows the answer: I'd be most grateful for any help. I'm looking for online world plant distribution maps, in particular at present for stinging nettle species. I've found plenty for particular countries, but not one for the world. My curiosity is because a R4 programme about British exports of stinging-nettle tea to China (they're welcome to it) mentioned that our nettle was unknown in that country. I assume they meant either or both of _Urtica dioecia_ and _U. urens_. Either way, I was a bit surprised -- I gather the things are found at least as far east as India, and they are introductions in N. America and Australia. I never cease to be surprised at how slow plants seem to be to spread across land-masses, even allowing for deserts and mountain ranges. .... According to wikipaedia, China specifically is host to at least 2 nettle species, Urtica platyphylla and Urtica angustifolia and may be host to others on the list. Quite how many competing species of any one particular genus can establish themselves and surive alongside already established species will presumably be a primary limiting factor, regardless of the distribution vectors. The full list is as follows - Urtica angustifolia. China, Japan, Korea. Urtica cannabina. Western Asia from Siberia to Iran. Urtica dioica (Stinging nettle or Bull nettle). Europe, Asia, North America. Urtica dubia (Large-leaved nettle) Canada. Urtica ferox (Ongaonga or tree nettle). New Zealand. Urtica hyperborea. Himalaya from Pakistan to Bhutan, Mongolia and Tibet, high altitudes. Urtica incisa (Scrub nettle). Australia. Urtica laetivirens. Japan, Manchuria. Urtica parviflora. Himalaya (lower altitudes). Urtica pilulifera (Roman nettle). Europe Urtica platyphylla. China, Japan. Urtica thunbergiana. Japan. Urtica urens (Dwarf nettle or Annual nettle). Europe, North America. http://en.wikipedia.org/wiki/Nettle michael adams .... -- Mike. |
#3
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Lazy-ish enquiry: distribution maps
In article ,
Mike Lyle wrote: I never cease to be surprised at how slow plants seem to be to spread across land-masses, even allowing for deserts and mountain ranges. Well, yes and no. It depends critically on HOW they spread. Ones carried by wide-ranging birds or high into the air by the wind have been ubiquitous since time immemorial. Nettles, oxlip etc. spread by seeds falling under gravity, and so will move slowly. Only the occasional one will be carried further by mammals or birds. Black nightshade, on the other hand, is spread by many species of birds and is ubiquitous. Regards, Nick Maclaren. |
#4
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Lazy-ish enquiry: distribution maps
Stewart Robert Hinsley wrote:
In message , Mike Lyle writes Fed up with Googling, so perhaps somebody here knows the answer: I'd be most grateful for any help. I'm looking for online world plant distribution maps, in particular at present for stinging nettle species. I've found plenty for particular countries, but not one for the world. http://linnaeus.nrm.se/flora/di/urti...c/urtidio.html http://linnaeus.nrm.se/flora/di/urti...c/urtiure.html "Norra halvklotet" buttons take you to world distribution maps. [...] Many thanks, Michael, Nick, Stewart. -- Mike. |
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